Redundant system and method for optical fiber connection from valve control equipment to thyristor

Abstract

The invention discloses an optical fiber connection redundancy system and method from valve control equipment to thyristors, and belongs to the technical field of high-voltage direct-current transmission. A control case of the valve control equipment comprises a transmitting board card, a receiving board card and a main control board card, and an optical fiber and an optical distributor form a two-stage MSC (Mobile Switching Center) network; the transmitting board card is connected with a trigger input end of the thyristor control board card through a two-stage MSC network, a feedback signal of the thyristor control board card is connected with the receiving board card, and the transmitting board card and the receiving board card are respectively connected with the main control board card; the main control board card is used for generating and sending a thyristor trigger signal or an inspection signal to the transmitting board card, acquiring feedback information of the thyristor control board card received by the receiving board card, and calculating and positioning a fault position by using the feedback information of the thyristor control board card; and the thyristor control board card is used for receiving the thyristor trigger signal or the inspection signal sent by the transmitting board card, controlling the conduction of the thyristor according to the thyristor trigger signal, and sending feedback information to the receiving board card.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage direct current power transmission, and in particular relates to an optical fiber connection redundancy system and method for valve-controlled equipment to thyristors. Background Art

[0002] High-voltage direct current transmission is the main transmission method for most of the power transmission projects under construction and put into operation due to its long transmission distance, large capacity and low loss. As the most core component in the high-voltage direct current transmission project, the converter valve is a power device based on thyristor series technology, which completes the conversion of AC into DC rectification or AC into DC inversion under the command of the valve control device. As a monitoring and control device for the converter valve, the valve control device can control and monitor the operating status of the valve in real time. At present, there are two types of optical tubes that send trigger signals from valve control devices: high-power optical devices and low-power optical devices. The main difference is the different light intensity of the trigger signal sent from the valve control. For valve control using high-power optical devices, when the valve control device sends the optical trigger signal to the thyristor through optical fiber, it generally uses an optical distributor to divide several optical trigger signals into multiple optical trigger signals to achieve trigger signal light intensity conversion.

[0003] Since the trigger light tube power of the valve-controlled equipment using high-power light tubes is relatively large, the thyristor control board receives low-power optical signals and must be matched through optical distributors and optical fibers. Under the premise of ensuring the reliability of the valve-controlled equipment, there are various networking methods. When a fault occurs, there are many devices and optical fibers involved, which are often difficult to troubleshoot and time-consuming and labor-intensive. It is necessary to design a networking method that can both ensure the reliability of the trigger circuit and quickly locate the fault. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem of lack of networking that can ensure the reliability of the trigger circuit and quickly locate the fault, and proposes a redundant system and method for optical fiber connection from valve control equipment to thyristors.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: In a first aspect, the present invention provides a redundant system for optical fiber connection from a valve-controlled device to a thyristor, comprising a valve-controlled device, an optical distributor, an optical fiber and a thyristor, wherein the valve-controlled device is connected to a thyristor control board through the optical fiber and the optical distributor, and the thyristor control board is connected to the thyristor; The control chassis of the valve control device includes a transmitting board, a receiving board and a main control board, the optical fiber and the optical distributor constitute a two-level MSC network, the transmitting board is connected to the trigger input end of the thyristor control board through the two-level MSC network, the feedback signal of the thyristor control board is connected to the receiving board, and the transmitting board and the receiving board are respectively connected to the main control board; The main control board is used to generate and send thyristor trigger signals or inspection signals to the transmitting board, obtain feedback information from the thyristor control board received by the receiving board, and calculate and locate the fault position using the feedback information from the thyristor control board; The thyristor control board is used to receive the thyristor trigger signal or inspection signal sent by the transmitting board, control the conduction of the thyristor according to the thyristor trigger signal, and send feedback information to the receiving board.

[0006] Further, the two-level MSC networking includes a first-level MSC networking and a second-level MSC networking, the electrical signal output end of the main control board is connected to the electrical signal input end of the transmitting board, the optical signal output end of the transmitting board is connected to the optical signal input end of the first-level MSC networking, the optical signal output end of the first-level MSC networking is connected to the optical signal input end of the second-level MSC networking, the optical fiber output end of the second-level MSC networking is connected to the optical fiber input end of the thyristor control board, the optical fiber output end of the thyristor control board is connected to the optical fiber input end of the receiving board, and the electrical signal output end of the receiving board is connected to the electrical signal input end of the main control board.

[0007] Further, the thyristors are arranged in several groups, each group has several thyristors, the thyristor control boards are arranged in several groups, each group has several thyristor control boards, one thyristor control board is connected to one thyristor, several optical fibers are connected between the optical distributor of a single second-level MSC network and a single group of thyristor control boards, and several optical fibers are connected between the single group of thyristor control boards and a single receiving board; a single receiving board is arranged with several optical fiber channels, and one optical fiber channel is connected to one optical fiber.

[0008] Furthermore, the transmitting board is provided with light pipes, the transmitting board is provided with a plurality of light pipes, a single transmitting board has a plurality of light pipes, and a single optical distributor of the first-level MSC networking has a plurality of output ends.

[0009] Furthermore, the optical pipe of the transmitting board is connected to the input end of the optical distributor of the first-level MSC network, and the output end of the optical distributor of the first-level MSC network is connected to the optical distributor of the second-level MSC network.

[0010] Further, the transmitting board includes a first transmitting board and a second transmitting board, the light pipe includes a first light pipe and a second light pipe, and the first-level MSC networking includes a first optical distributor and a second optical distributor; The first input end of the first optical distributor is connected to the optical signal output end of the first optical tube of the first transmitting board, and the second input end of the first optical distributor is connected to the optical signal output end of the first optical tube of the second transmitting board; The four output ends of the first optical distributor are respectively connected to the optical distributor of the second-level MSC network; The first input end of the second optical distributor is connected to the optical signal output end of the second optical tube of the first transmitting board, and the second input end of the second optical distributor is connected to the optical signal output end of the second optical tube of the second transmitting board; The four output ends of the second optical distributor are respectively connected to the optical distributors of the second-level MSC network.

[0011] Further, the second-level MSC networking includes a third optical distributor, a fourth optical distributor, a fifth optical distributor and a sixth optical distributor; The first output end of the first optical distributor is connected to the first input end of the third optical distributor, the second output end of the optical distributor of the first-level MSC network is connected to the first input end of the fourth optical distributor, the third output end of the optical distributor of the first-level MSC network is connected to the first input end of the fifth optical distributor, and the fourth output end of the optical distributor of the first-level MSC network is connected to the first input end of the sixth optical distributor; The first output end of the second optical distributor is connected to the second input end of the third optical distributor, the second output end of the second optical distributor is connected to the second input end of the fourth optical distributor, the third output end of the second optical distributor is connected to the second input end of the fifth optical distributor, and the fourth output end of the second optical distributor is connected to the second input end of the sixth optical distributor; The thyristor control board cards include a first group of thyristor control board cards, a second group of thyristor control board cards, a third group of thyristor control board cards and a fourth group of thyristor control board cards; The output end of the third optical distributor is connected to one end of the first group of thyristor control boards, the output end of the fourth optical distributor is connected to one end of the second group of thyristor control boards, the output end of the fifth optical distributor is connected to one end of the third group of thyristor control boards, and the output end of the sixth optical distributor is connected to one end of the fourth group of thyristor control boards.

[0012] Further, the receiving board includes a first receiving board, a second receiving board, a third receiving board and a fourth receiving board, the other end of the first group of thyristor control boards is optically connected to the first receiving board, the other end of the second group of thyristor control boards is optically connected to the second receiving board, the other end of the third group of thyristor control boards is optically connected to the third receiving board, and the other end of the fourth group of thyristor control boards is optically connected to the fourth receiving board.

[0013] In a second aspect, the present invention provides a method for redundant control of optical fiber connection from a valve-controlled device to a thyristor, using the redundant optical fiber connection system from a valve-controlled device to a thyristor, the method comprises the following steps: When the main control board is in the condition that the thyristor is turned on, the main control board sends a trigger signal to the optical transmitter board, and the transmitter board sends the trigger signal through several optical signal output ends at the same time. The trigger signal reaches the thyristor control board through the optical distributor and optical fiber to turn on the thyristor; When the thyristor does not meet the conduction conditions, the main control board controls several optical signal output ends of the transmitting board to send out inspection signals in sequence, and the receiving board receives the inspection signal returned by the thyristor control board and forwards it to the main control board.

[0014] Furthermore, the main control board calculates whether the system is normal and determines the fault point according to the status of the returned inspection signal.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention proposes a redundant optical fiber connection system from a valve-controlled device to a thyristor. The valve-controlled device distributes the trigger signal to the optical distributor on the thyristor side through the optical distributor on the valve-controlled side, and the optical distributor on the thyristor side distributes the trigger signal to each thyristor, thereby realizing multi-loop triggering of the trigger signal. At the same time, when the thyristor does not meet the conduction condition, the valve-controlled device sends a patrol signal, calculates the signal returned by the thyristor, and finally determines whether there is a trigger circuit failure and determines the fault point. The redundant configuration of the trigger signal and the online operation positioning of the fault can be realized, which can not only ensure the availability and reliability of the valve-controlled device and the thyristor, but also quickly and accurately locate the problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 A schematic diagram of a control cabinet of a valve control device of an optical fiber connection redundant system from a valve control device to a thyristor according to the present invention.

[0017] Figure 2 The present invention is a schematic diagram of an optical fiber connection of an optical fiber connection redundant system from a valve control device to a thyristor.

[0018] Among them, 1 is the main control board, 2 is the transmitting board, and 3 is the receiving board. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] Embodiment 1 A redundant optical fiber connection system from a valve control device to a thyristor includes a valve control device, an optical distributor, an optical fiber and a thyristor. The valve control device is connected to a thyristor control board through the optical fiber and the optical distributor to control the opening and closing of the valve. The thyristor control board is connected to the thyristor; The control chassis of the valve control equipment includes a transmitting board 2, a receiving board 3 and a main control board 1, and is the control center of the valve control equipment. The optical fiber and the optical distributor form a two-level MSC (Multiple Star Coupler) network. The transmitting board 2 is connected to the trigger input end of the thyristor control board through the two-level MSC network. The feedback signal of the thyristor control board is connected to the receiving board 3. The transmitting board 2 and the receiving board 3 are respectively connected to the main control board 1; The transmitting board 2 is used to receive the thyristor trigger signal or inspection signal generated by the main control board 1 and forward it to the thyristor control board through the two-level MSC network; it is connected to the main control board 1 through electrical signals; The receiving board 3 is used to receive the feedback signal of the thyristor control board and forward it to the main control board 1; it is connected to the main control board 1 through electrical signals; The main control board 1 is used to generate and send a thyristor trigger signal or an inspection signal to the transmitting board 2, obtain the feedback information of the thyristor control board received by the receiving board 3, and use the feedback information of the thyristor control board to calculate and locate the fault position; it is connected to the transmitting board 2 and the receiving board 3 respectively through electrical signals.

[0024] The thyristor control board is used to receive the thyristor trigger signal or inspection signal sent by the transmitting board 2, control the conduction of the thyristor according to the thyristor trigger signal, and send feedback information to the receiving board 3. It is connected to the transmitting board 2 and the receiving board 3 through an optical distributor and optical fiber, and connected to the thyristor through electrical signals.

[0025] The working process of the system is as follows: the main control board 1 generates a thyristor trigger signal or inspection signal and sends it to the transmitting board 2. After the transmitting board 2 receives the signal, it forwards it to the thyristor control board through the two-level MSC networking. The thyristor control board controls the conduction of the thyristor according to the received signal and generates feedback information. The feedback information is sent to the receiving board 3 through optical fiber. After receiving the feedback information, the receiving board 3 forwards it to the main control board 1. The main control board 1 uses the feedback information for analysis and processing, such as locating the fault location.

[0026] Preferably, the two-level MSC networking includes a first-level MSC networking and a second-level MSC networking, the electrical signal output end of the main control board 1 is connected to the electrical signal input end of the transmitting board 2, the optical signal output end of the transmitting board 2 is connected to the optical signal input end of the first-level MSC networking, the optical signal output end of the first-level MSC networking is connected to the optical signal input end of the second-level MSC networking, the optical fiber output end of the second-level MSC networking is connected to the optical fiber input end of the thyristor control board, the optical fiber output end of the thyristor control board is connected to the optical fiber input end of the receiving board 3, and the electrical signal output end of the receiving board 3 is connected to the electrical signal input end of the main control board 1.

[0027] The first-level MSC networking, as the first level of signal transmission, is responsible for the preliminary distribution and transmission of the optical signal output by the transmitting board 2. The input end receives the optical signal output of the transmitting board 2, and the output end transmits the distributed optical signal to the second-level MSC networking. The second-level MSC networking, as the second level of signal transmission, further distributes and transmits the optical signal received from the first-level MSC networking to ensure that the signal can accurately reach each thyristor control board. The input end receives the optical signal output of the first-level MSC networking, and the output end transmits the signal to the optical fiber input end of the thyristor control board through an optical fiber. The electrical signal output end of the main control board 1 is connected to the electrical signal input end of the transmitting board 2 for sending a thyristor trigger signal or a patrol signal, and the electrical signal input end of the main control board 1 is connected to the electrical signal output end of the receiving board 3 for receiving feedback information. The electrical signal input end of the transmitting board 2 receives the electrical signal output of the main control board 1, and the optical signal output end of the transmitting board 2 converts the electrical signal into an optical signal and outputs it to the optical signal input end of the first-level MSC networking. The optical fiber input end of the thyristor control board receives the optical signal transmitted by the second-level MSC network, and the optical fiber output end sends feedback information to the optical fiber input end of the receiving board 3. The optical fiber input end of the receiving board 3 receives the feedback information sent by the thyristor control board, and the electrical signal output end of the receiving board 3 converts the optical signal into an electrical signal and outputs it to the electrical signal input end of the main control board 1.

[0028] The working process of the system is as follows: the main control board 1 generates a thyristor trigger signal or inspection signal and sends it to the transmitting board 2 via an electrical signal. The transmitting board 2 converts the received electrical signal into an optical signal and outputs it to the first-level MSC network. The first-level MSC network performs preliminary distribution and transmission of the optical signal and then sends it to the second-level MSC network. The second-level MSC network further distributes and transmits the optical signal to ensure that the signal can accurately reach each thyristor control board. The thyristor control board receives the optical signal and controls the conduction state of the thyristor according to the signal content, and generates feedback information at the same time. The feedback information is sent back to the receiving board 3 via optical fiber. The receiving board 3 converts the received optical signal into an electrical signal and sends it to the main control board 1 for processing and analysis.

[0029] The two-level MSC networking architecture ensures accurate and reliable signal transmission in the valve control equipment control system through efficient optical signal distribution and transmission, thereby achieving precise control of thyristors and fault location.

[0030] Several groups of thyristors are provided, each group has several thyristors, several groups of thyristor control boards are provided, each group has several thyristor control boards, one thyristor control board is connected to one thyristor, and there is a one-to-one relationship between thyristors and thyristor control boards. Several optical fibers are connected between the optical distributor of a single second-level MSC network and a single group of thyristor control boards to achieve distribution and transmission of optical signals, and several optical fibers are connected between a single group of thyristor control boards and a single receiving board 3 to transmit control signals or data from the thyristor control board to the receiving board 3; a single receiving board 3 is provided with several optical fiber channels, one optical fiber channel is connected to one optical fiber, and is used to receive optical signals from different sources.

[0031] Optionally, the transmitting board 2 is provided with a light pipe, the transmitting board 2 is provided with a plurality of light pipes, the number of light pipes of a single transmitting board 2 is provided with a plurality of light pipes, and the output end of a single optical distributor of the first-level MSC networking is provided with a plurality of light pipes. The output end of the optical distributor of a single first-level MSC networking is provided with a plurality of light pipes. The input signal is distributed to different channels or paths to meet the connection requirements of the second-level MSC networking or the thyristor control board.

[0032] Optionally, the optical pipe of the transmitting board 2 is connected to the input end of the optical distributor of the first-level MSC network, ensuring that the optical signal generated by the transmitting board 2 can directly and efficiently enter the first-level MSC network for distribution. The output end of the optical distributor of the first-level MSC network is connected to the optical distributor of the second-level MSC network. The signal is allowed to be initially distributed in the first-level MSC network and then transmitted to the second-level MSC network for further distribution and transmission.

[0033] The working process of the system is as follows: the main control board 1 generates control signals, which are transmitted to the transmitting board 2 through electrical connections. The optical tube on the transmitting board 2 converts the received electrical signals into optical signals. These optical signals are then transmitted to the input end of the optical distributor of the first-level MSC network. In the first-level MSC network, the optical distributor distributes the received optical signals to different output ends. These distributed optical signals are then transmitted to the input end of the optical distributor of the second-level MSC network. In the second-level MSC network, the optical distributor distributes the signals again to ensure that each required thyristor control board can receive the corresponding optical signal. After receiving the optical signal, the thyristor control board converts it into an electrical signal to control the conduction state of the thyristor. At the same time, the thyristor control board also generates feedback signals, which are transmitted back to the receiving board 3 through the optical fiber channel. The receiving board 3 converts the received optical signal into an electrical signal and transmits it back to the main control board 1 for processing and analysis.

[0034] Through the use of optical pipes and optical distributors, the system can achieve high-speed, large-capacity signal transmission. The cascade structure of the system allows flexible expansion and configuration according to actual needs. Optical signal transmission has the advantages of strong anti-interference ability and long transmission distance, which improves the reliability of the system.

[0035] Embodiment 2 A method for redundant control of optical fiber connection from a valve control device to a thyristor comprises the following steps: When the main control board 1 meets the conditions for the thyristor to be turned on, for example, receiving a turn-on instruction or meeting the preset turn-on conditions, the main control board 1 sends a trigger signal to the optical transmitter board 2, and the transmitter board 2 sends the trigger signal through several optical signal output terminals at the same time. After receiving the trigger signal, the transmitter board 2 will send it through several optical signal output terminals at the same time. These optical signals are transmitted to the corresponding thyristor control board through the optical distributor and optical fiber. After receiving the trigger signal, the thyristor control board will control the corresponding thyristor to be turned on.

[0036] When the thyristor does not meet the conditions for conduction, for example, it is in standby state or waiting for the next conduction instruction, the main control board 1 controls the several optical signal output ends of the transmitting board 2 to send out inspection signals in sequence, and these inspection signals are also transmitted to the corresponding thyristor control board through the optical distributor and optical fiber. After receiving the inspection signal, the thyristor control board will generate a feedback signal and transmit it back to the receiving board 3 through the optical fiber. After receiving the inspection signal returned by the thyristor control board, the receiving board 3 forwards it to the main control board 1.

[0037] The main control board 1 calculates whether the system is normal and determines the fault point according to the returned inspection signal status.

[0038] By sending out a trigger signal at the same time and sending out a patrol signal in sequence, the system can achieve rapid response and fault detection of the thyristor. Fiber optic connection has the advantages of strong anti-interference ability and long transmission distance, which improves the reliability of signal transmission. At the same time, the redundant optical signal output terminal and patrol mechanism ensure that the system can still work normally when some components fail. The method of this embodiment can locate the specific fault point through the return state of the patrol signal, which provides convenience for subsequent maintenance and replacement. The method can achieve effective control and fault detection of thyristors and improve the overall performance and reliability of the system.

[0039] Embodiment 3 A redundant system for optical fiber connection from a valve control device to a thyristor includes a valve control device, an optical distributor, an optical fiber and a thyristor. This embodiment takes a single valve in a 12-pulse converter valve as an example to illustrate the composition of the system. This embodiment describes the networking solution of the converter valve control system with the minimum unit.

[0040] Schematic diagram of valve control equipment chassis Figure 1 , the transmitting board 2 is responsible for sending the trigger signal generated by the main control board 1 through the light tube. The four light tubes of the two light transmitting boards are used to trigger the same single valve; the receiving board 3 is responsible for receiving the feedback signal from the thyristor side and forwarding the feedback information to the main control board 1; the main control board 1 is responsible for controlling the emission of the transmitting board 2 and calculating the thyristor feedback information received by the receiving board 3 to locate the fault position. All optical fibers are networked through a 2-level MSC. The 1-level MSC of this embodiment is a 2-input 4-output optical distributor. The failure of any optical input signal does not affect the output of the optical signal; the 2-level MSC of this embodiment is a 2-input N-output optical distributor. N is the number of optical fiber channels. N is determined according to actual needs. The failure of any optical input signal does not affect the output of the optical signal. The specific connections are as follows: Figure 2 As shown. A MSC, also called an optical splitter, is a fiber optic junction device with multiple input ports and multiple output ports, commonly used for coupling, branching and distribution of optical signals. It is an optical fiber or optical waveguide device that realizes the coupling of optical signals from one channel to multiple channels or multiple channels to multiple channels.

[0041] The two-level MSC network includes a first-level MSC network and a second-level MSC network, the electrical signal output end of the main control board 1 is connected to the electrical signal input end of the transmitting board 2, the optical signal output end of the transmitting board 2 is connected to the optical signal input end of the first-level MSC network, the optical signal output end of the first-level MSC network is connected to the optical signal input end of the second-level MSC network, the optical fiber output end of the second-level MSC network is connected to the optical fiber input end of the thyristor control board, the optical fiber output end of the thyristor control board is connected to the optical fiber input end of the receiving board 3, and the electrical signal output end of the receiving board 3 is connected to the electrical signal input end of the main control board 1. Figure 1 , the main control board 1 and the transmitting board 2 are connected through the backplane in the chassis and connected through electrical signals; the main control board 1 and the receiving board 3 are connected through the backplane in the chassis and connected through electrical signals; In this embodiment, the transmitting board 2 includes a first transmitting board T1 and a second transmitting board T2, the light pipe includes a first light pipe U1 and a second light pipe U2, and the first-level MSC network includes a first optical distributor MSC_A and a second optical distributor MSC_B; The first input terminal MSCA1 of the first optical distributor MSC_A is connected to the optical signal output terminal of the first optical tube U1 of the first transmitting board card T1, and the second input terminal MSCA2 of the first optical distributor MSC_A is connected to the optical signal output terminal of the first optical tube U1 of the second transmitting board card T2; The four output ends of the first optical distributor MSC_A are respectively connected to the optical distributors of the second-level MSC network; The first input terminal MSCB1 of the second optical distributor MSC_B is connected to the optical signal output terminal of the second optical tube U2 of the first transmitting board T1, and the second input terminal MSCB2 of the second optical distributor MSC_B is connected to the optical signal output terminal of the second optical tube U2 of the second transmitting board T2; The four output ends of the second optical distributor MSC_B are respectively connected to the optical distributors of the second-level MSC network.

[0042] The second-level MSC network includes a third optical distributor MSC_1, a fourth optical distributor MSC_2, a fifth optical distributor MSC_3 and a sixth optical distributor MSC_4; The first output end of the first optical distributor MSC_A is connected to the first input end MSC1_1 of the third optical distributor MSC_1, the second output end of the optical distributor of the first-level MSC network is connected to the first input end MSC2_1 of the fourth optical distributor MSC_2, the third output end of the optical distributor of the first-level MSC network is connected to the first input end MSC3_1 of the fifth optical distributor MSC_3, and the fourth output end of the optical distributor of the first-level MSC network is connected to the first input end MSC4_1 of the sixth optical distributor MSC_4; The first output end of the second optical distributor MSC_B is connected to the second input end MSC1_2 of the third optical distributor MSC_1, the second output end of the optical distributor MSC_B is connected to the second input end MSC2_2 of the fourth optical distributor MSC_2, the third output end of the optical distributor MSC_B is connected to the second input end MSC3_2 of the fifth optical distributor MSC_3, and the fourth output end of the optical distributor MSC_B is connected to the second input end MSC4_2 of the sixth optical distributor MSC_4; The output end of the third optical distributor MSC_1 is connected to one end of the optical fiber of the first group of thyristor control board cards, the output end of the fourth optical distributor MSC_2 is connected to one end of the optical fiber of the second group of thyristor control board cards, the output end of the fifth optical distributor MSC_3 is connected to one end of the optical fiber of the third group of thyristor control board cards, and the output end of the sixth optical distributor MSC_4 is connected to one end of the optical fiber of the fourth group of thyristor control board cards.

[0043] The receiving board 3 includes a first receiving board R1, a second receiving board R2, a third receiving board R3 and a fourth receiving board R4. The other end of the first group of thyristor control boards is connected to the first receiving board R1 by optical fiber, the other end of the second group of thyristor control boards is connected to the second receiving board R2 by optical fiber, the other end of the third group of thyristor control boards is connected to the third receiving board R3 by optical fiber, and the other end of the fourth group of thyristor control boards is connected to the fourth receiving board R4 by optical fiber.

[0044] Each receiving board 3 has a number of channels, U1 is the first optical channel of the board, U2 is the second optical channel of the board, and Un is the last optical channel of the board.

[0045] Embodiment 4 A method for redundant control of optical fiber connection from a valve-controlled device to a thyristor is provided. The method uses a redundant optical fiber connection system from a valve-controlled device to a thyristor in Embodiment 3. After comprehensive judgment, the main control board 1 sends a trigger signal to the transmitting board 2 when the thyristor has a conduction condition. The transmitting board 2 sends the trigger signal through four optical tubes at the same time. The trigger signal reaches the thyristor control board through an optical distributor and optical fiber to conduct the thyristor. As long as one of the four optical tubes of the two transmitting boards 2 can work normally, the entire system can still trigger the thyristor, thereby greatly improving the availability of the system.

[0046] When the thyristor does not meet the conditions for conduction, the main control board 1 controls the four light tubes of the transmitting board 2 in an orderly manner to send out inspection signals (different from the trigger signal) in turn. After receiving the inspection signal returned by the thyristor control board, the receiving board 3 forwards it to the main control board 1. The main control board 1 calculates whether the system is normal based on the status of the returned inspection signal.

[0047] The inspection algorithm is as follows: A represents the return inspection signal status of receiving board 3 when T1U1 is emitting light.

[0048] B represents the return inspection signal status of receiving board 3 when T1U2 is emitting light.

[0049] C represents the return inspection signal status of receiving board 3 when T2U1 is emitting light.

[0050] D represents the return inspection signal status of the receiving board 3 when T2U2 is emitting light.

[0051] R1, R2, R3, and R4 represent four receiving boards 3 respectively.

[0052] 1 represents a patrol failure (the patrol return signal received by all optical receiving channels of a single receiving board is less than the required value), and 0 represents a normal patrol signal. The patrol signal status table is shown in Table 1; Table 1 Inspection status table

[0053] In the table, T1U1 represents the first light pipe U1 of the first transmitting board T1, T1U2 represents the second light pipe U2 of the first transmitting board T1, T2U1 represents the first light pipe U1 of the second transmitting board T2, and T2U2 represents the second light pipe U2 of the second transmitting board T2; R1 represents the first receiving board, R2 represents the second receiving board, R3 represents the third receiving board, and R4 represents the fourth receiving board; When all the values ​​in column A are 1, it means that the optical fiber MSCA1 or T1U1 at the first input end of the first optical distributor MSC_A is abnormal.

[0054] When all the values ​​in column B are 1, it means that the optical fiber MSCA2 or T2U1 at the second input end of the first optical distributor MSC_A is abnormal.

[0055] When all the values ​​in column C are 1, it means that the optical fiber MSCB1 or T1U2 at the first input end of the second optical distributor MSC_B is abnormal.

[0056] When all the values ​​in column D are 1, it means that the optical fiber MSCB2 or T2U2 at the second input end of the second optical distributor MSC_B is abnormal.

[0057] When both columns A and C are 1, it means that the first optical distributor MSC_A is abnormal.

[0058] When both the B column and the D column are 1, it means that the second optical distributor MSC_B is abnormal.

[0059] When both columns A and B are 1, it means that the first transmitting board T1 is abnormal.

[0060] When both columns C and D are 1, it means that the second transmitting board T2 is abnormal.

[0061] When the A column and C column of the R1 board are both 1 and the B column and D column are both 0, it means that the optical fiber at the first input end MSC1_1 of the third optical distributor MSC_1 is abnormal.

[0062] When the A column and C column of the R2 board are both 1 and the B column and D column are both 0, it means that the optical fiber at the first input end MSC2_1 of the fourth optical distributor MSC_2 is abnormal.

[0063] When the A column and C column of the R3 board are both 1 and the B column and D column are both 0, it means that the optical fiber at the first input end MSC3_1 of the fifth optical distributor MSC_3 is abnormal.

[0064] When the A column and C column of the R4 board are both 1 and the B column and D column are both 0, it means that the optical fiber at the first input end MSC4_1 of the sixth optical distributor MSC_4 is abnormal.

[0065] When the values ​​in columns A and C of the R1 board are both 0 and the values ​​in columns B and D are both 1, it indicates that the optical fiber at the second input end MSC1_2 of the third optical distributor MSC_1 is abnormal.

[0066] When the values ​​in columns A and C of the R2 board are both 0 and the values ​​in columns B and D are both 1, it indicates that the optical fiber at the second input end MSC2_2 of the fourth optical distributor MSC_2 is abnormal.

[0067] When the values ​​in columns A and C of the R3 board are both 0 and the values ​​in columns B and D are both 1, it indicates that the optical fiber at the second input end MSC3_2 of the fifth optical distributor MSC_3 is abnormal.

[0068] When the values ​​in columns A and C of the R4 board are both 0 and the values ​​in columns B and D are both 1, it indicates that the optical fiber at the second input end MSC4_2 of the sixth optical distributor MSC_4 is abnormal.

[0069] When the values ​​in columns A, B, C, and D of the R1 board are all 1, it means that the third optical distributor MSC_1 is abnormal.

[0070] When the values ​​in columns A, B, C, and D of the R2 board are all 1, it means that the fourth optical distributor MSC_2 is abnormal.

[0071] When the values ​​in columns A, B, C, and D of the R3 board are all 1, it means that the fifth optical distributor MSC_3 is abnormal.

[0072] When the values ​​in columns A, B, C, and D of the R4 board are all 1, it means that the sixth optical distributor MSC_4 is abnormal.

[0073] Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0074] The above content is a further detailed description of the present invention. It cannot be determined that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the present invention determined by the submitted claims.

Claims

1. A redundant optical fiber connection system from a valve control device to a thyristor, characterized in that: It includes a valve control device, an optical distributor, an optical fiber and a thyristor, wherein the valve control device is connected to a thyristor control board through the optical fiber and the optical distributor, and the thyristor control board is connected to the thyristor; The control chassis of the valve control device includes a transmitting board, a receiving board and a main control board, the optical fiber and the optical distributor constitute a two-level MSC network, the transmitting board is connected to the trigger input end of the thyristor control board through the two-level MSC network, the feedback signal of the thyristor control board is connected to the receiving board, and the transmitting board and the receiving board are respectively connected to the main control board; The main control board is used to generate and send thyristor trigger signals or inspection signals to the transmitting board, obtain feedback information from the thyristor control board received by the receiving board, and calculate and locate the fault position using the feedback information from the thyristor control board; The thyristor control board is used to receive the thyristor trigger signal or inspection signal sent by the transmitting board, control the conduction of the thyristor according to the thyristor trigger signal, and send feedback information to the receiving board.

2. The optical fiber connection redundant system from valve control equipment to thyristor according to claim 1, characterized in that: The two-level MSC networking includes a first-level MSC networking and a second-level MSC networking, the electrical signal output end of the main control board is connected to the electrical signal input end of the transmitting board, the optical signal output end of the transmitting board is connected to the optical signal input end of the first-level MSC networking, the optical signal output end of the first-level MSC networking is connected to the optical signal input end of the second-level MSC networking, the optical fiber output end of the second-level MSC networking is connected to the optical fiber input end of the thyristor control board, the optical fiber output end of the thyristor control board is connected to the optical fiber input end of the receiving board, and the electrical signal output end of the receiving board is connected to the electrical signal input end of the main control board.

3. The optical fiber connection redundant system from valve control equipment to thyristor according to claim 1, characterized in that: The thyristors are arranged in several groups, each group has several thyristors, the thyristor control boards are arranged in several groups, each group has several thyristor control boards, one thyristor control board is connected to one thyristor, several optical fibers are connected between the optical distributor of a single second-level MSC network and a single group of thyristor control boards, and several optical fibers are connected between the single group of thyristor control boards and a single receiving board; a single receiving board is arranged with several optical fiber channels, and one optical fiber channel is connected to one optical fiber.

4. The optical fiber connection redundant system from valve control equipment to thyristor according to claim 2, characterized in that: The transmitting board is provided with light pipes, and the transmitting board is provided with a plurality of light pipes. The number of light pipes of a single transmitting board is provided with a plurality of light pipes, and the number of output ends of a single optical distributor of the first-level MSC networking is provided with a plurality of light pipes.

5. The optical fiber connection redundant system from valve control equipment to thyristor according to claim 4, characterized in that: The optical pipe of the transmitting board is connected to the input end of the optical distributor of the first-level MSC network, and the output end of the optical distributor of the first-level MSC network is connected to the optical distributor of the second-level MSC network.

6. The optical fiber connection redundant system from valve control equipment to thyristor according to claim 5, characterized in that: The transmitting board includes a first transmitting board and a second transmitting board, the light pipe includes a first light pipe and a second light pipe, and the first-level MSC networking includes a first optical distributor and a second optical distributor; The first input end of the first optical distributor is connected to the optical signal output end of the first optical tube of the first transmitting board, and the second input end of the first optical distributor is connected to the optical signal output end of the first optical tube of the second transmitting board; The four output ends of the first optical distributor are respectively connected to the optical distributor of the second-level MSC network; The first input end of the second optical distributor is connected to the optical signal output end of the second optical tube of the first transmitting board, and the second input end of the second optical distributor is connected to the optical signal output end of the second optical tube of the second transmitting board; The four output ends of the second optical distributor are respectively connected to the optical distributors of the second-level MSC network.

7. The optical fiber connection redundant system from valve control equipment to thyristor according to claim 6, characterized in that: The second-level MSC networking includes a third optical distributor, a fourth optical distributor, a fifth optical distributor and a sixth optical distributor; The first output end of the first optical distributor is connected to the first input end of the third optical distributor, the second output end of the optical distributor of the first-level MSC network is connected to the first input end of the fourth optical distributor, the third output end of the optical distributor of the first-level MSC network is connected to the first input end of the fifth optical distributor, and the fourth output end of the optical distributor of the first-level MSC network is connected to the first input end of the sixth optical distributor; The first output end of the second optical distributor is connected to the second input end of the third optical distributor, the second output end of the second optical distributor is connected to the second input end of the fourth optical distributor, the third output end of the second optical distributor is connected to the second input end of the fifth optical distributor, and the fourth output end of the second optical distributor is connected to the second input end of the sixth optical distributor; The thyristor control board cards include a first group of thyristor control board cards, a second group of thyristor control board cards, a third group of thyristor control board cards and a fourth group of thyristor control board cards; The output end of the third optical distributor is connected to one end of the first group of thyristor control boards, the output end of the fourth optical distributor is connected to one end of the second group of thyristor control boards, the output end of the fifth optical distributor is connected to one end of the third group of thyristor control boards, and the output end of the sixth optical distributor is connected to one end of the fourth group of thyristor control boards.

8. The optical fiber connection redundant system from valve control equipment to thyristor according to claim 7, characterized in that: The receiving board includes a first receiving board, a second receiving board, a third receiving board and a fourth receiving board. The other end of the first group of thyristor control boards is connected to the first receiving board by optical fiber, the other end of the second group of thyristor control boards is connected to the second receiving board by optical fiber, the other end of the third group of thyristor control boards is connected to the third receiving board by optical fiber, and the other end of the fourth group of thyristor control boards is connected to the fourth receiving board by optical fiber.

9. A method for redundant control of optical fiber connection from valve control equipment to thyristor, characterized in that: Using a valve control device to thyristor optical fiber connection redundant system as claimed in any one of claims 2 to 8, the method comprises the following steps: When the main control board is in the condition that the thyristor is turned on, the main control board sends a trigger signal to the optical transmitter board, and the transmitter board sends the trigger signal through several optical signal output ends at the same time. The trigger signal reaches the thyristor control board through the optical distributor and optical fiber to turn on the thyristor; When the thyristor does not meet the conduction conditions, the main control board controls several optical signal output ends of the transmitting board to send out inspection signals in sequence, and the receiving board receives the inspection signal returned by the thyristor control board and forwards it to the main control board.

10. A method for redundant control of optical fiber connection from valve control equipment to thyristor according to claim 9, characterized in that: The main control board calculates whether the system is normal and determines the fault point based on the status of the returned inspection signal.

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